Vitamin A is a fat-soluble vitamin made up of closely related unsaturated hydrocarbons, including retinol, retinal, retinoic acid, and several provitamin A carotenoids. [1] Vitamin A and its derivates, either natural or synthetic, are collectively and generally referred to as retinoids. [2]
This vitamin carries the distinction of having being used therapeutically approximately 3000 years ago, in ancient Egypt to treat endemic night blindness, [3] a condition wherein a person finds it difficult to see in dim light.

The Father of Medicine himself, Hippocrates (460–325 BC) of Cos, Greece, suggested a diet of raw liver (liver cells store around 80% of the total body vitamin A in lipid droplets [4] ) to cure night blindness. [5] To date, a myriad of studies have furnished sufficient research data that scientifically support vitamin A’s role in embryogenesis, reproduction, vision, and regulation of inflammation, and growth and differentiation of cells. [2]

Vitamin A is involved in the cyclic visual process. Borrowing the words of Wald (1935), “Vitamin A is the precursor of visual purple (rhodopsin, or the biological pigment in photoreceptor cells of the retina) as well as the product of its decomposition; the visual processes therefore constitute a cycle.” [6] Moreover, the retinal form of vitamin A plays a role in transducting light into neural signals essential for vision. [7] Vitamin A’s dermatological function and importance has also long been investigated, starting perhaps with Wolbach and Howe’s 1925 study on epidermal changes as abnormal keratinization following vitamin A deprivation in albino white rat models. [8]

In a randomized, double-blind, vehicle-controlled study, vitamin A topically administered was reported to improve the fine wrinkles associated with natural aging among the elderly subjects and to significantly increase the expression of glycosaminoglycan (a well-known and important “water retainer”) and the production of collagen. [9] Vitamin A, anti-infective in nature, also contributes to the integrity and normal functioning of diverse immune defenses. Because vitamin A protects epithelial barriers such as the skin and the mucosal cells of the airways, digestive tract, and urinary tract from any adverse alterations and regulates immune function, the body’s first line of defense against invading pathogens – and in general infection – is kept intact and functioning optimally and ideally. [10]

Vitamin A exists in two different forms in the diet: preformed vitamin A and provitamin A, the former being found in animal products such as meat, fish, poultry, and dairy foods, whereas the latter in plant-based foods such as fruits and vegetables. [11] Preformed vitamin A includes retinol (an alcohol) and retinal (an aldehyde that can be converted by the body to retinoic acid, the isomers of which are known to act as hormones that influence gene expression and thereby numerous physiological processes). Provitamin A on the other hand refers to β-carotene and other carotenoids. [12]

Please note that the vitamin A IU listings given from the USDA database do not take into account the bioavailability of various carotenoids. For men, the Recommended Dietary Allowance (RDA) is 900 μg retinol activity equivalents (RAE)/day, while for women, 700 μg RAE/day. The Tolerable Upper Intake Level (UL) for adults is set at 3,000 μg/day of preformed vitamin A. [14]

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An amazing discovery in an abandoned house in Austin, Texas: A lost book of amazing survival knowledge, believed to have been long vanished to history, has been found in a dusty drawer in the house which belonged to a guy named Claude Davis.

Remember... back in those days, there was no electricity... no refrigerators... no law enforcement... and certainly no grocery store or supermarkets... Some of these exceptional skills are hundreds of years of old and they were learned the hard way by the early pioneers.

We've lost to history so much survival knowledge that we've become clueless compared to what our great grandfathers did or built on a daily basis to sustain their families.

Neighbors said that for the last couple of years Claude has tried to unearth and learn the forgotten ways of our great-grandparents and claimed to have found a secret of gargantuan proportions. A secret that he is about to reveal together with 3 old teachings that will change everything you think you know about preparedness: